Do a break after the Gorges du Cians D28 in Beuil. There´s a very nice coffee shop there for a snack with a nice scenery around. Take the D30 towards Roubion. Nice and curvy mountain road in great condition with a good scenery around. After roubion the D30 changes to M30, quite scenic, narrow, and loads of bends, quite steep in some points until Saint Sauveur Sur Tinee. overall it is a great and picturesque route. Quite fun to do as well.